class PrintShippingPackageLabelAskDetails(ModelView):
    'Print Shipping Package Label Ask Details'
    __name__ = 'shipping.package.label.ask_details'

    label = fields.Many2One('shipping.package.label', 'Label', required=True)
    move = fields.Many2One('stock.move', 'Picked Move', required=True,
        domain=[('id', 'in', Eval('done_moves'))],
        depends=['done_moves'],
        help="The move to print.")
    fields_required = fields.Function(fields.MultiSelection(
            'get_fields_required', "Fields Required"),
            'on_change_with_fields_required')
    customer = fields.Many2One('party.party', "Customer", readonly=True,
        states={
            'invisible': ~Eval('fields_required', []).contains('customer.name')
        },
        depends=['fields_required'])
    product = fields.Function(
        fields.Many2One('product.product', "Product Code",
        states={
            'invisible': (~Eval('fields_required', []).contains('product.code')
                & ~Eval('fields_required', []).contains('product.name'))
        },
        depends=['fields_required']), 'on_change_with_product')
    done_moves = fields.Many2Many(
        'stock.move', None, None, "Done Moves")

    @classmethod
    def get_fields_required(cls):
        pool = Pool()
        ShippingPackageLabel = pool.get('shipping.package.label')
        return ShippingPackageLabel.fields_get(
            ['fields_required'])['fields_required']['selection']

    @fields.depends('label')
    def on_change_with_fields_required(self, name=None):
        if self.label:
            return self.label.fields_required

    @fields.depends('customer')
    def on_change_with_label(self):
        if self.customer:
            if self.customer.shipping_package_label:
                return self.customer.shipping_package_label.id

    @fields.depends('move')
    def on_change_with_product(self, name=None):
        if self.move:
            if self.move.sale_line:
                return self.move.sale_line.product_displayed.id

class PrintShippingPackageLabel(Wizard):
    'Print Shipping Package Label'
    __name__ = 'shipping.package.label.print'

    start = StateTransition()
    show = StateView(
        'shipping.package.label.ask_details',
        'preciball.'
        'stock_shipping_package_label_print_ask_details', [
            Button('Cancel', 'end', 'tryton-cancel'),
            Button('Print Label', 'print_labels', 'tryton-ok', default=True),
            ])
    print_labels = StateAction('preciball.stock_report_shipping_package_label')

    def transition_start(self):
        Date = Pool().get('ir.date')
        moves = self.record.inventory_moves
        if getattr(self.show, 'shipping_date', None) is None:
            self.show.shipping_date = Date.today()
        if any(m.state == 'done' for m in moves):
            return 'show'
        return 'end'

    def default_show(self, fields):
        moves = self.record.inventory_moves
        move_ids = [m.id for m in moves if m.state == 'done']
        return {
            'customer': self.record.customer.id,
            'done_moves': move_ids,
            }